Flywheel



March 5, 1929. E. L. DAY

FLYWHEEL Filed July 5, 1926y Patented Mar. 5, 1929.

1,703,991 T` oFFIcE.

EDMUND L. DAY, or SANFORD, FLORIDA. a

FLYWHEEL.

Application led Tilly 1 3,

rlhis invention appertains to novel appliances for drive shafts and more particularly to a novel arrangement of ily wheels thereon.

The primary object of the present invention is to provide a pair of independent .fly wheels upon the drive shaft of a motor, the combined weight of the wheels being equal to the normal weight of the single ily wheel generally used in conjunction therewith, one of said fly wheels being keyed to the drive shaft with means whereby the other wheel can be connected with the first mentioned fly wheel and shaft for synchronous rotation therewith, the novel arrangement facilitating the easy starting of the engine and the gradual assuming of the load of the fly wheels by the drive shaft and engine.

A further object of the invention is the provision of novel means for connecting the independent fly wheels together for synchronous movement, whereby the wheels can be set at the desired positions .in an expeditious and convenient manner. j

A still further object of the invention is to provide a novel arrangement of ily Wheels and a drive shaft of the above character,y

which will be durable and eilicient in use, one that will be simple and easy to manufacture, and one which can be market at a small cost.

lJVith these and other objects in view, the invention consists in the novel coi'istruction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the aci'fonipanying drawings; in which drawings:

lligure 1 is a side elevation of one form of my invention,

Figure 2 is a'longitudinal section through the saine.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter' A generally indi'- cates a drive shaft, which can be. considered, in the present instance, as the crank shaft of a drive motor, such as an internal combustion engine. The drive shaft A has arranged thereon fly wheels 1() and 15 and as shown the fly wheel 10 isofa greater sii/.e than the ily Ywheel 15, although these wheels can be of the same or varying sizes without.

departing from the spirit or the scopevof thisinvention. It is preferred however that the combined weight of the ily wheels will placed upon the 1826. Serial No. 120,471.

be the same as the weight of the ordinary fly wheel used in a drive shaft of a particular type of engine. The fly wheel 10 embodies an elongatedhub 11, the weighted rim 12, and the eonnectingbody or spoke 13. vAs shown, the hub 11' isv rigidly connectedy with the drive shaft A for rotation therewith by means of a hey 1&1-, but it is to be understood that the wheel can be connected to the shaft for movement therewith in any other-preferred way. i The fly wheel 15 is olf substantially the same construction as the` wheel 10 and also embodies yan elongated hub 16, tl'ieweighted riin-17and the connecting spokes or body 18. It is to be noted that the hubs 11 and 1G of the wheelsk 10 and 15 project inwardly toward one another and that the` same are provided f with mated clutch I" ces 19 andQO respectively. The ily wheel 15 is rotatably mounted upon the vdrive shaft A and can be held against sliding movement in one 4direction in any preferred way, such as by a suitable collar. As shown one end of the shaft A is reduced in diameter as at 21 to provide a stopshoulder 22 against which the wheel 15 normally rests. 1n order to bring about the sliding movement of the iiywheel 15y on the shaft A, in accordance with this invention, the elongated hub sleeve 16 is provided with an annular gri'iove 23 in which Vis normally fitted Ya yoke 24k of a clutch shifting lever 25, which can be operated .in any desired way.

lfn use of the invention, the motor is started in the usual way withthe `fly wheel 15 disconnected from the fly wheel 10. Owing to 'the fact that the iiy wheel 10 is of a weight than the ordinary wheel, the starting of the motor will be gradual and will be. considerably facilitated. As the motor gains in speed, thelever 25 is operated for moving vthe clutch 2O in engagement with the clutch 19, whereby the wheels 10 and 15 will rotate in unison. The combined effect of ally wheel of full weight isnow i obtained. l

This invention has proven especially advantageous in marine motors, butalso can be used on antoniobiles, aircraft and the like. f y

' `Changes in details may be made without departing from the spiritor the scope of this invention, but what I claim as new is: The combination with a shaft, a ily wheel vnu including an elongated 1mb sleeve secured to the Shaft, a chitch section carried by the inner endo the sleeve, a second fly "Wheel rotatably and slidably mounted on'thesliaft including an elongated liulo sleeve extending toward the hub sleeve of the tiret mentioned fly Wheel7 a clutch section Carried by the 'tliefirstmentioned Hy Wheel to connect the saine `toget-liel` for synchronous rotation.

n testimony whereof I affix my signature.

EDMUND L. DAY. 

